This is something public pressure can change. Costco isn't being asked to reinvent any wheel -- whatever its objections might be (accounting systems? tax issues? computer programming?) Wal*Mart's taking food stamps shows that those problems can be solved and at an acceptable cost.Why not congregational letter-writing campaigns? The ethical eating program hasn't gotten any traction in my congregation or (so far as I know) the other four UU congregations nearby, but I can imagine synergy between Costco/food stamps and the ethical eating project.